diff options
Diffstat (limited to 'drivers/net/sk98lin/h/skcsum.h')
| -rw-r--r-- | drivers/net/sk98lin/h/skcsum.h | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/drivers/net/sk98lin/h/skcsum.h b/drivers/net/sk98lin/h/skcsum.h new file mode 100644 index 00000000000..2b94adb9333 --- /dev/null +++ b/drivers/net/sk98lin/h/skcsum.h @@ -0,0 +1,219 @@ +/****************************************************************************** + * + * Name: skcsum.h + * Project: GEnesis - SysKonnect SK-NET Gigabit Ethernet (SK-98xx) + * Version: $Revision: 1.10 $ + * Date: $Date: 2003/08/20 13:59:57 $ + * Purpose: Store/verify Internet checksum in send/receive packets. + * + ******************************************************************************/ + +/****************************************************************************** + * + * (C)Copyright 1998-2001 SysKonnect GmbH. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * The information in this file is provided "AS IS" without warranty. + * + ******************************************************************************/ + +/****************************************************************************** + * + * Description: + * + * Public header file for the "GEnesis" common module "CSUM". + * + * "GEnesis" is an abbreviation of "Gigabit Ethernet Network System in Silicon" + * and is the code name of this SysKonnect project. + * + * Compilation Options: + * + * SK_USE_CSUM - Define if CSUM is to be used. Otherwise, CSUM will be an + * empty module. + * + * SKCS_OVERWRITE_PROTO - Define to overwrite the default protocol id + * definitions. In this case, all SKCS_PROTO_xxx definitions must be made + * external. + * + * SKCS_OVERWRITE_STATUS - Define to overwrite the default return status + * definitions. In this case, all SKCS_STATUS_xxx definitions must be made + * external. + * + * Include File Hierarchy: + * + * "h/skcsum.h" + * "h/sktypes.h" + * "h/skqueue.h" + * + ******************************************************************************/ + +#ifndef __INC_SKCSUM_H +#define __INC_SKCSUM_H + +#include "h/sktypes.h" +#include "h/skqueue.h" + +/* defines ********************************************************************/ + +/* + * Define the default bit flags for 'SKCS_PACKET_INFO.ProtocolFlags' if no user + * overwrite. + */ +#ifndef SKCS_OVERWRITE_PROTO /* User overwrite? */ +#define SKCS_PROTO_IP 0x1 /* IP (Internet Protocol version 4) */ +#define SKCS_PROTO_TCP 0x2 /* TCP (Transmission Control Protocol) */ +#define SKCS_PROTO_UDP 0x4 /* UDP (User Datagram Protocol) */ + +/* Indices for protocol statistics. */ +#define SKCS_PROTO_STATS_IP 0 +#define SKCS_PROTO_STATS_UDP 1 +#define SKCS_PROTO_STATS_TCP 2 +#define SKCS_NUM_PROTOCOLS 3 /* Number of supported protocols. */ +#endif /* !SKCS_OVERWRITE_PROTO */ + +/* + * Define the default SKCS_STATUS type and values if no user overwrite. + * + * SKCS_STATUS_UNKNOWN_IP_VERSION - Not an IP v4 frame. + * SKCS_STATUS_IP_CSUM_ERROR - IP checksum error. + * SKCS_STATUS_IP_CSUM_ERROR_TCP - IP checksum error in TCP frame. + * SKCS_STATUS_IP_CSUM_ERROR_UDP - IP checksum error in UDP frame + * SKCS_STATUS_IP_FRAGMENT - IP fragment (IP checksum ok). + * SKCS_STATUS_IP_CSUM_OK - IP checksum ok (not a TCP or UDP frame). + * SKCS_STATUS_TCP_CSUM_ERROR - TCP checksum error (IP checksum ok). + * SKCS_STATUS_UDP_CSUM_ERROR - UDP checksum error (IP checksum ok). + * SKCS_STATUS_TCP_CSUM_OK - IP and TCP checksum ok. + * SKCS_STATUS_UDP_CSUM_OK - IP and UDP checksum ok. + * SKCS_STATUS_IP_CSUM_OK_NO_UDP - IP checksum OK and no UDP checksum. + */ +#ifndef SKCS_OVERWRITE_STATUS /* User overwrite? */ +#define SKCS_STATUS int /* Define status type. */ + +#define SKCS_STATUS_UNKNOWN_IP_VERSION 1 +#define SKCS_STATUS_IP_CSUM_ERROR 2 +#define SKCS_STATUS_IP_FRAGMENT 3 +#define SKCS_STATUS_IP_CSUM_OK 4 +#define SKCS_STATUS_TCP_CSUM_ERROR 5 +#define SKCS_STATUS_UDP_CSUM_ERROR 6 +#define SKCS_STATUS_TCP_CSUM_OK 7 +#define SKCS_STATUS_UDP_CSUM_OK 8 +/* needed for Microsoft */ +#define SKCS_STATUS_IP_CSUM_ERROR_UDP 9 +#define SKCS_STATUS_IP_CSUM_ERROR_TCP 10 +/* UDP checksum may be omitted */ +#define SKCS_STATUS_IP_CSUM_OK_NO_UDP 11 +#endif /* !SKCS_OVERWRITE_STATUS */ + +/* Clear protocol statistics event. */ +#define SK_CSUM_EVENT_CLEAR_PROTO_STATS 1 + +/* + * Add two values in one's complement. + * + * Note: One of the two input values may be "longer" than 16-bit, but then the + * resulting sum may be 17 bits long. In this case, add zero to the result using + * SKCS_OC_ADD() again. + * + * Result = Value1 + Value2 + */ +#define SKCS_OC_ADD(Result, Value1, Value2) { \ + unsigned long Sum; \ + \ + Sum = (unsigned long) (Value1) + (unsigned long) (Value2); \ + /* Add-in any carry. */ \ + (Result) = (Sum & 0xffff) + (Sum >> 16); \ +} + +/* + * Subtract two values in one's complement. + * + * Result = Value1 - Value2 + */ +#define SKCS_OC_SUB(Result, Value1, Value2) \ + SKCS_OC_ADD((Result), (Value1), ~(Value2) & 0xffff) + +/* typedefs *******************************************************************/ + +/* + * SKCS_PROTO_STATS - The CSUM protocol statistics structure. + * + * There is one instance of this structure for each protocol supported. + */ +typedef struct s_CsProtocolStatistics { + SK_U64 RxOkCts; /* Receive checksum ok. */ + SK_U64 RxUnableCts; /* Unable to verify receive checksum. */ + SK_U64 RxErrCts; /* Receive checksum error. */ + SK_U64 TxOkCts; /* Transmit checksum ok. */ + SK_U64 TxUnableCts; /* Unable to calculate checksum in hw. */ +} SKCS_PROTO_STATS; + +/* + * s_Csum - The CSUM module context structure. + */ +typedef struct s_Csum { + /* Enabled receive SK_PROTO_XXX bit flags. */ + unsigned ReceiveFlags[SK_MAX_NETS]; +#ifdef TX_CSUM + unsigned TransmitFlags[SK_MAX_NETS]; +#endif /* TX_CSUM */ + + /* The protocol statistics structure; one per supported protocol. */ + SKCS_PROTO_STATS ProtoStats[SK_MAX_NETS][SKCS_NUM_PROTOCOLS]; +} SK_CSUM; + +/* + * SKCS_PACKET_INFO - The packet information structure. + */ +typedef struct s_CsPacketInfo { + /* Bit field specifiying the desired/found protocols. */ + unsigned ProtocolFlags; + + /* Length of complete IP header, including any option fields. */ + unsigned IpHeaderLength; + + /* IP header checksum. */ + unsigned IpHeaderChecksum; + + /* TCP/UDP pseudo header checksum. */ + unsigned PseudoHeaderChecksum; +} SKCS_PACKET_INFO; + +/* function prototypes ********************************************************/ + +#ifndef SK_CS_CALCULATE_CHECKSUM +extern unsigned SkCsCalculateChecksum( + void *pData, + unsigned Length); +#endif /* SK_CS_CALCULATE_CHECKSUM */ + +extern int SkCsEvent( + SK_AC *pAc, + SK_IOC Ioc, + SK_U32 Event, + SK_EVPARA Param); + +extern SKCS_STATUS SkCsGetReceiveInfo( + SK_AC *pAc, + void *pIpHeader, + unsigned Checksum1, + unsigned Checksum2, + int NetNumber); + +extern void SkCsGetSendInfo( + SK_AC *pAc, + void *pIpHeader, + SKCS_PACKET_INFO *pPacketInfo, + int NetNumber); + +extern void SkCsSetReceiveFlags( + SK_AC *pAc, + unsigned ReceiveFlags, + unsigned *pChecksum1Offset, + unsigned *pChecksum2Offset, + int NetNumber); + +#endif /* __INC_SKCSUM_H */ |